Artificial arm.



R. W.' TUCKER.

ARTIFICIAL ARM.

APPLICATION FILED SEPT- 24| l9l5.

l ,1 92,244. Patented July 25, 1916. I 2 SHEETS-SHEET l.

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R. w. TUCKER.

ARTIFICIAL ARM.

APPLICATIoN FILED sPT.24. 1915.

1,192,244. PatentedJuIy25, 1916.

2 SHEETS-SHEET 2.

RALEGH W. TKER, OF BANDON, OREGON.

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inoaalii.

ASip'eciiiciaton of Letters fatent.

ratentei July 25, 19116.

To all wtom t may concern.'

Be it known 'that I, Rani/lien W. TU QirER, a citizen o'f `the UnitedStates, 'residing at Banden, in the county of Coos and State of Oregon,have invented new and `useful Improvements in Artificial Arms, of whichthe following is a specification.

This invention relates to certain novel and .useful improvements inartificial arms.

be varied, and wherein the gripping elements may be 'turned 'relativelyto the socket of the arm and locked in the desired position.

It is also my 'purpose to improve and simplify the general constructionof `artificial arms and to provide an arm wherein the component partswill be s o arranged and correlated as to reduce the possibility o'fderangeme'nt to a minimum and at the same time enable access to be hadto such parts for repairing, cleaning or thelike.

Vith the above and other objectsin View,

the invention consists in the construction,l

combination and yarrangement of rparts hereinafter set forth inlandfalling within the scope of the claims.

ln the accompanying drawings; Figure -1 is a perspective View showing myimproved artificial arm in use. Fig. 2 is a longitudinal sectional viewthrough the arm. Fig. 3 is a cross sectional view on the line 33 ofyFig. 2. Fig. L is a similar view on the line of Fig. 2. Fige isan'enlarged fragmentary longitudinal sectional view taken at rightangles to Fig. 2. .i

Referring "now tothe drawings in detail, 1 designates a socket adaptedto receive the handless forearm and tapering downwardly from the innerend toward the outer end and split lat its inner endforfa portion .ofits length, the socket at the opposite si'd'eslof the split portionbeing formed with eyelets 2 that receive a cord Swhereby the socket maybe laced tightly about the adjacent portion of the forearm. Encirclingthe outer end of the socket 1, that is, the relatively small endthereof, is a metal .annulus 4. having, the

outer end thereof screw threaded as at 5 and threaded onto the outer endof the annulus 4: is, what I term a hollow wrist section 6 having theouter end thereof equipped with a cap 7 which may beieither formedintegral with the wristsection or detachably fastened thereto. Securedto the outer surface of the cap 7 and projecting outwardly therefrom isa hook section 8, while formed Ain the cap at one side ofthehook'section 8 is a slot 9 andjprojecting through the slot 9 and capableof swinging movement therein is a hook `section 10 having the inner endthereof pivoted upon a pivot pin 11 arranged transversely of the wristsection 6. Formed integral with the inner end of the hooksection 10 andprojecting outwardlythrough a 'slot 12 formed in the side wall of thewrist Section is an 'operating arm 13 capable of swinging movementwithin the slot 12 to move the hook section 1`0 into `and out ofengagement with the hook section 8. The

confronting edges of. the hook sections 8 and 10 are preferablyflattened so that when the sections are together they will present, ineffect, an integral hook. 14 designates a retractile spring having oneend fastened vto thearm 13 and .theother extremity secured to the innerwally of the; wrist section 8 and this spring acts to hold the movablehook section normally in 'engagement with the stationary .hooky section.

The Vwrist section 6 is capable of turning movement relatively to theSocket so as to dispose the hook in. any desired position relatively tothe .socket andl of being locked in adjusted position. In the presentinstance, the locking means comprises a lever 15 pivoted betweenitsendsupon a stud 16 carried by the side wall of the wrist section Gandhaving one end projecting through a slot 17 formed in ther side wall ofthe wrist section and the remaining end secured tok one eX- tremityof aretractile spring 18, such spring havingthe other end thereof fastenedto the end cap of the wrist section. The outer end of thelever 15 isformed with an outwardly projectingslia'nk 19 formed with ahead 20.Formed in the outer threaded end of the annulus 4 and'suit'ably spacedap'art'are notches 21 adapted to receive one edge of the lever 15 whenthe latter isacti'iated in one direction. Normally, th'e lever 15 isheld in engagement with one or Vthe other of the notches 21 under theaction of the spring 18 and so holds the wrist section against turningmovement relatively vto the socket and maintains the hook in the desiredposition. lVhen, however, it is desired to revolve the wrist section,the lever is swung about the stud 16 by the head 20 against the actionof the spring 18, thereby disengaging thel leverr from the adjacentnotch and permitting the wrist section to be revolved.

Formed in the side wall of the socket 1 is a longitudinallyextendinggroove 22 opening onto the relatively small end of the socket within theannulus, and slidably mounted within this groove 22 is a bar 23 havingone edge adjacent to the outer end formed with a. series of notches 24spaced apart appropriate distances longitudinally of the bar. Secured tothe outer surface of the socket and covering the groove 22 therein is aplate 25 formed of metal or other suitable material and provided with anelongated slot 26 adjacent to the inner end thereofl and working withinthe slot 26 is a pin 27 carried by the adjacent portion of the bar 23and pivoted upon the pin 27 between its ends is a lever 28 andpivota-lly connected to one end of the lever 28 is a yoke 29 and pivotedwithin the yoke 29cis one end of a link 30 capable of swinging movementat right angles to the movement of the link, while pivotally secured tothe remaining end v`of the link 30 is a yoke 31 capable of swingingmovement at an angle to the movement of the link and connected to theouter end of the operating arm 13. Pivotally connected to the inner'endof the plate 25 is an arm 32 adapted to lie along side of that portionof the humanarm between the shoulder and the elbow and having the innerend thereof equipped with a strap 33 whereby the same may be fastened tothe adjacent portion of the human arm. The remaining end of the lever 28is connected through the agency of a link 34 with the arm 32. In thepresent instance, the lever 28 and its associated parts and the slottedportion of the plate 25 are inclosed in a casing 35 of leather or othersuitable material. Surrounding the annulus 4 and capable of rotarymovement thereon is a collar 36 equipped with a pin 37 projectingthrough a slot 38 formed in the annulus and adapted to engage in any oneof the notches 24 in the bar 23 to hold the latter in the desiredadjusted position.

39 designates a securing band adapted to encircle the human armjust'above the elbow and coperating with thesocket 1 and strap 33 tomaintainthe artificial arm upon the 1 human arm. l

In practice, the artificial arm is secured to the human arm by thesocket, the band 39 and the strap 33 and the arm 32 lies along side ofthat portion of the human arm between the shoulder and the elbow. In thedownward movement of the handless forearm, the socket is similarlyactuated and the lever '28 swung about the pin 27. In this swinging ofthe lever, the link 30 is projected forwardly with the effect to swingthe actuating arm 13 against the action of the spring 14 to separate thehook sections. In the upward movement of the forearm, the artificial armis similarly actuated and the direction of movement of the lever 28reversed whereby the hook sections are drawn together and when drawntogether' grasp any article between the same.

The bar 23 is held against longitudinal movement within the groove 22 bymeans of the pin l37 on the collar 36 and when it is desired to vary thedistance that the hook sections open, the collar 36 is rotated todisengage the pin 37 from the adjacent notch, and the bar movedlongitudinally within the groove 22 to the desired position and when theproper adjustment has been obtained the pin 37 on the collar 36 isengaged in the adjacent notch with the eect to maintain the bar 23 inadjusted position. When the bar is moved toward the outer end of thesocket, the throw of the arm 13 is shortened, while when the bar ismoved in the opposite direction the throw of the arm 13 is lengthened,thereby enabling the hook sections to open any desired distance.

While I have herein shown and described one preferred form of myinvention by way of illustration, yI wish it to be understood that I donot limit or confine myself to the precise details of constructionherein described and delineated, as modiiication and variation may bemade within the scope of the claims without departing Vfrom the spiritof the invention.

I claim:

1. An artificial arm comprising a socket adapted to receive the handlessforearm, means for securing said socket to the forearm, a wrist sectionon the outer end of said socket, a hook carried by the outer end ofsaid'wrist section and formed of two sections, one of which is capableof movement relatively to the other to open and closed positions, meansoperable by movement of the forearm for swinging said movable hooksections including a fulcrumed element, movable means upon whichsaid'element is fulcrumed, and means for moving said lastnamed means tochange the fulcrum point of said element whereby the opening movement ofsaid hook sections may be varied.

2.A An artificial arm comprising a socket adapted to receive thehandless forearm, an annulus on the outer end of said socket having theouter end thereof formed with outside notches, a wrist section mountedupon said annulus and capable of rotary movement thereon, and a leverpivoted within said wrist section and adapted to engage in any one ofthey notches insaid annulus to iso hold the wrist section againstturning movement, and a hook carried by said wrist section.

3. An artificial arm comprising a socket adapted to receive the handlessforearm, an annulus on the outer end of said socket having the outer endthereof formed with notches, a wrist section mounted upon said annulusand capable of rotary movement thereon, a lever pivoted within saidwrist section and adapted to engage in any one of the notches in saidannulus to hold the wrist section against turning movement, a hookcarried by said wrist section, a spring within said wrist sectionholding said lever normally in locking position, and means on said leverprojecting through said wrist section whereby the lever may be swungagainst the action of the spring to release the wrist section.

4. An artificial arm comprising a socket adapted to receive the handlessforearm, a wrist section onk the outer end ofV said socket, a hookcarried by the outer end of said wrist section and formed of twosections, one of `which is capable of movement relatively to v the otherto open and closed positions, a bar slidably mounted upon said socket, alever pivoted between its ends upon said bar,

means connected to one end of said lever and operable in the movement ofthe forearm to swing the lever, and a connection between the remainingend of said lever and said movable hook section whereby the latter maybe swung in the movement of the forearm.

5. An artificial arm comprising a socket slidably mounted upon saidsocket, a lever pivoted between its ends upon said bar,

kmeans connected to one end of said lever and operable in the movementof the forearm to swing the lever, a connection between the remainingend of said lever and said movable hook section whereby the latter maybe `swung in the movement of the forearm, said bar being capable ofsliding movement to change the pivot point of said lever whereby themovement of said movable hook section may be varied, and means forlocking said bar in adjusted position.

6. An artificial arm comprising a socket adapted to receive the handlessforearm, an annulus on the outer end of said socket having the outer endthereof formed with notches, a wrist section mounted upon said annulusand capable of turning movement thereon, and a spring actuated leverpivoted within said wrist section and adapted to engage in any one ofthe notches in said annulus to hold the wrist section against turningmovement.

In testimony whereof I aiiiX my signature in presence of two witnesses.

RALEIGH W. TUCKER.

Witnesses:

JOHN NIELsoN, I. C. FRnDRroKs.

Copies of this patent may be obtained for ve cents each, by addressingthe Commissioner of Patents Washington, D. C.

